Today, I cracked the root of Android phone and got a supersu, but I just updated this prompt. After the update, the original version has not been deleted.
Download an Android optimization master, which contains the uninstallation of the system's own software, such as system slimming. Try to delete your own software. If it still doesn't work, restore the factory settings and clear the phone cache, and the root permission will not be cleared. Then try to delete the self-contained software in the initial state of the phone.